摘要
Spontaneous optical emission properties of laser-produced plasma during laser damage events at input and exit surfaces of fused silica were retrieved and compared.We show that plasma at the input surface is much larger in size and exhibits significantly higher electron number density and excitation temperature,even when smaller laser energy was used.This effect was attributed to the stronger laser–plasma coupling at the input surface.In addition,a strong continuum background containing three peaks at 1.3eV,1.9eV,and 2.2eV was observed at the exit surface,and possible origins for this effect are also discussed.
Spontaneous optical emission properties of laser-produced plasma during laser damage events at input and exit surfaces of fused silica were retrieved and compared. We show that plasma at the input surface is much larger in size and exhibits significantly higher electron number density and excitation temperature, even when smaller laser energy was used. This effect was attributed to the stronger laser–plasma coupling at the input surface.In addition, a strong continuum background containing three peaks at 1.3 e V, 1.9 e V, and 2.2 e V was observed at the exit surface, and possible origins for this effect are also discussed.
作者
Chao Shen
Nanjing Zhao
Jaka Pribosek
Mingjun Ma
Li Fang
Xingjiu Huang
Yujun Zhang
沈超;赵南京;Jaka Pribo?ek;马明俊;方丽;黄行九;张玉钧(Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Key Laboratory of Optical Monitoring Technology for Environment;Carinthian Tech Research;Institute of Intelligent Machines, Chinese Academy of Sciences;State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology)
基金
supported by the National Natural Science Foundation of China(No.21735005)
